Bests & Worsts Reviews from Amazon

I've been doing professional free-lance work for the last 5 years, and shoot just about a wedding every weekend. I have tried multiple cards from multiple manufactures, and without a doubt, this is the worst card. I ordered two from Amazon, and within one week, BOTH cards failed on me. I have an A7s, 5Dmkiii, and 6D, and none of them could read. So I swapped them out for two more. Again, within a week, BOTH NEW CARDS completely stopped working. That's 4 failed cards. Two other wedding videographers I work with have also had this card fail on them. I simply can not recommend a card that has this type of track record.